Carburetor



C. M; PARK.

GARBURETOR.

APPLICATION FILED FEB. 11. 1919.

Patented Nov. 21, 1922.

2 SHEETSSHEET I,

Patented Nov. 21, 1922.

UNITED STATES PATENT OFFICE.

GARBURETOR.

Application filed February 11, 1919. Serial No. 276,273.

To all whom it may concern.

Be it known that I, CHAUNCEY M. PARK, a citizen of the United States of America, residing at Flint, in the county of Genesee and State of Michigan, have invented new and useful Improvements in Carburetors of which the following is a specification.

The object of the invention is to provide a new and novel form of carburetor for use in conjunction with internal combustion engines, the carburetor working on the principle of a deposit of a film of gasoline on a perforated surface. The suction stroke of the engine with which the carburetor is used serves to draw in a quantity of air through this perforated surface which blows the film of gasoline into a fine spray and to this spray air is added to form a properly explosive mixture, said air being admitted through a separate valve controlled inlet.

The invention is illustrated and described in a specific embodiment, to which, however, it is not to be restricted. The right is reserved to make such changes or alterations as the actual reduction to practice may suggest, in so far as such changes or alterations are compatible in spirit with the annexed claim.

The same numerals of reference designate the same parts throughout the several figures of drawings, wherein:

Figure 1 is a central longitudinal sectional view through the improved carburetor.

Figure 2 is a section on the line 2-2 of Figure 1.

Figure 3 is a section on the line 3-3 of Figure 1.

As shown, the invention comprises a cylindrical fuel chamber 1, which is of annular shape and surrounds a tubular member 2, which depends below the bottom of the chamber 1 and extends above the top thereof, the upper end of the tubular member 2 being formed with a flange 3 by means of which it may be bolted to the intake manifold of an internal combustion engine.

Substantially at an intermediate point in the height of the chamber 1 there is a hollow member 4 having the shape of a cross. This hollow member 4 is disposed within the tubular member 2 so that the arms of which it is composed are radially positioned within the said tubular member. This hollow member 4 on the upper faces of its arms is provided with a plurality of perforations 5 and perforations 6 exist in the wall of the tubular member directly above the upper faces of the arms of hollow member 4;. and these perforations 6 establish communication between the interior of the fuel chamber 1 and the interior of the tubular member 2.

Communication is further established between the tubular member 2 and the chamher 1 by means of a plurality of perforations formed in the wall of the tubular member just below the top of the chamber 1. The chamber 1 is air tight except for what air might be admitted thereinto through the perforations 6 and 7, the latter perforations admitting the necessary air on top of the fuel to permit it to leave the chamber 1 through the perforations 6.

p The design of the invention requires the admission of air to the hollow member 1 and to this end there is a right angular shaped tubular member 8, which communicates with one arm of the hollow member 4 through the wall of the tubular member 2 at the point where that arm connects with the wall of the tubular member. The tubular member 8 terminates at the outer wall of the fuel chamber 1 adjacent the top of the latter and is formed with an appropriate seat with which a conical shaped valve 9 may engage, this valve being formed with a threaded stem 10 and a head 11 to permit the stems being turned and the valve operated by hand, the stem being supported and the valve thus positioned by an appropriate bracket 12 carried by the fuel chamber on the outer wall thereof. It is obvious that the amount of air admitted to the hollow member 4 may be regulated by the proper adjustment of the valve 9.

The hollow member 1 is provided with upstanding side walls 13 standing above the upper faces of the arms, these walls being for a purpose later made apparent.

A butterfly valve 14 is carried in the tubular member 2 below the plane of the bottom of the fuel chamber 1 to regulate the amount of air admitted into the tubular member 2 from the lower end thereof, which opens into the atmosphere. The fuel chamber adjacent the top and at a point substantially diametrically opposite the valve 9 is formed with a nipple portion 15 into which there is screwed a valve element 16, the latter having connected therewith a tube or pipe 17, which is lead to the fuel tank positioned at any appropriate point for use in conjunction with the engine to which the carburetor is attached. The valve element 16 is formed with an appropriate seat for engagement by the conical shaped needle valve 18, the latter being carried by a float 19, which is swingingly secured to the interior wall of the chamber 1 adjacent the nipple 15, as indicated at 20. This float 19 is made preferably of cork and is of annular shape, standing in surrounding relation to the tubular member 2. Obviously, when the fuel in the tank 1 reaches the proper height, the float 19 will rise and seat the valve 18, thus cutting off the supply of fuel to the chamber 1.

WVith the present invention the proper height of the fuel in chamber 1 and the height to which the float 19 closes the valve 18, is that height which brings the level of the fuel in the plane of the perforation 6. A certain amount of fuel thus passes through the perforations 6 and settles on the upper faces of the arms 'of'the hollow member a, this fuel settling in the form of a film. Then the engine with which the carburetor is used is effecting its suction stroke, the suction created in the intake manifold obtains in that part'of the tubular member 2 above the hollow member 4 (this portion of the tubular member being a mixing chamber) and air is drawn through the tubular member 8 and into the hollow member a, passing through the minute perforations 5 and throwing off the film of fuel in the form of a spray. At'the same time air is drawn in through the lower part of the tubular member 2-that is,- as much air asthe position of the butterfly valve 14 will permit-and the air thus admitted through the bottom part of the tubular member passes through the spaces left between the arms of the hol low member 4 and this air affects the proper constituency of fuel mixture from the spray.

The upstanding walls 13 serve as retaining means keeping the film of fuel on top of the upper faces on the arms of the hollow member f and these arms define the openings or spaces through whichair is admitted from the bottom part of the tubular member 2 to the upper part thereof, which constitutes the mixing chamber.

The provision of the perforation 7 makes for the equalization of the pressure within the fuel chamber 1 and the mixing chamber.

The invention having been described, what is claimed as new and useful is:

In a carburetor, a fuel chamber, a tubular member which the fuel chamber surrounds, the tubular member having means for connection to the intake manifold of an engine, a hollow member disposed within the tubular member and having a perforated upper face, the tubular member being perforated adjacent the upper face of the hollow member to effect connnunication with the fuel chamber, whereby fuel in the fuel chamber may be admitted on top of the hollow memher to form a film thereon, and means for admitting air to the said hollow member for the useful purpose specified.

ture.

CHAUNCEY M. PARK.

In testimony whereof I affix my signa- 

